| Basso Siepi |
| Opera's Emma |
| Opera's Nellie |
| Singers like Siepi |
| Soap opera's genre |
| Opera's Gluck |
| Opera's cigarette girl |
| The Phantom of the Opera's name |
| Opera's Hans ___ |
| Opera's Ethiopian princess |
| Opera's Montserrat |
| The Phantom of the Opera's first name |
| Opera's Pinza |
| Opera's Maria |
| Opera's Carreras |
| Opera's Lehmann |
| Opera's Siepi |
| Opera's Varnay et al. |
| Opera's solo |
| Opera's Moser |
| Opera's Trojan princess |
| Opera's start |
| Opera's Stevens |
| Opera's "Swedish Nightingale |
| Opera's text |
| Opera's Caruso |
| Opera's "barbiere di qualità |
| Borgia or Siepi |
| Siepi et al. |
| Opera's Callas |